HG/T 20592  法兰盖 BL 500-40 MM RCMMMMMMM5 RF RF RF RFch4��

BL500-40 MM RCMMMMMMM5 RF RF RF RFch4��

SO 4"-150 FF

PL600-6Rf/1/R030.2 Sc

SO250(B)-16RF 6 s=25k=650 l=

47021 rf450-1.6 /6RFS

WN 80(B)-100 M S=6

WN 100(B)-10 RF S=8

SO 6"-150 FF

WN 8"-150 RF

3 FM 900-2.5 δ0=12��RFF@bi��g.h